Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/chromeos/language_preferences.cc

Index: chrome/browser/chromeos/language_preferences.cc
diff --git a/chrome/browser/chromeos/language_preferences.cc b/chrome/browser/chromeos/language_preferences.cc
index 77658dd6b658925295859436fec4b7626779dd33..f80dfcc66d1bedc992b4c9f53b91857bc8663cfa 100644
--- a/chrome/browser/chromeos/language_preferences.cc
+++ b/chrome/browser/chromeos/language_preferences.cc
@@ -4,6 +4,7 @@
 
 #include "base/basictypes.h"
 #include "chrome/browser/chromeos/language_preferences.h"
+#include "chrome/browser/prefs/pref_registrar_simple.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 
@@ -392,7 +393,7 @@ const int kXkbAutoRepeatDelayInMs = 500;
 const int kXkbAutoRepeatIntervalInMs = 50;
 const char kPreferredKeyboardLayout[] = "PreferredKeyboardLayout";
 
-void RegisterPrefs(PrefServiceSimple* local_state) {
+void RegisterPrefs(PrefRegistrarSimple* local_state) {
   // We use an empty string here rather than a hardware keyboard layout name
   // since input_method::GetHardwareInputMethodId() might return a fallback
   // layout name if local_state->RegisterStringPref(kHardwareKeyboardLayout)